 /*******************************************************************************
  * Copyright (c) 2000, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.activities;

 /**
  * An instance of this interface represents a binding between two activities.
  * The relationship can be interpreted as 'activity needs requiredActivity to
  * be enabled'.
  * Enablement of the activity requires enablement of the required activity.
  *
  * <p>
  * This interface is not intended to be extended or implemented by clients.
  * </p>
  *
  * @since 3.0
  * @see IActivity
  */
 public interface IActivityRequirementBinding extends Comparable {

     /**
      * Returns the identifier of the activity represented in this
      * binding.
      *
      * @return the identifier of the activity represented in this
      * binding. Guaranteed not to be <code>null</code>.
      */
     String getActivityId();

     /**
      * Returns the identifier of the required activity represented in this
      * binding. The enablement of the activity described by {@link #getActivityId()}
      * requires the enablement of this activity.
      *
      * @return the identifier of the required activity represented in this
      * binding. Guaranteed not to be <code>null</code>.
      */
     String getRequiredActivityId();
 }

